#!/bin/bash

######## CONFIGURE ########
JAVA_PROGRAM_DIR=""				# use full path to java bin dir, ex. "/usr/java/j2sdk1.4.2/bin/"
###########################

MSG0="Loading JUploadr:"
MSG1="Starting JUploadr..."
MSG2="Java exec found in "
MSG3="OOPS, your java version is too old "
MSG4="You need to upgrade to JRE 1.4.x or newer from http://java.sun.com"
MSG5="Suitable java version found "
MSG6="Configuring environment..."
MSG7="OOPS, you don't seem to have a valid JRE "
MSG8="OOPS, unable to locate java exec in "
MSG9=" hierarchy"
MSG10="Java exec not found in PATH, starting auto-search..."
MSG11="Java exec found in PATH. Verifying..."

look_for_java()
{
  JAVADIR=/usr/java
  IFS=$'\n'
  potential_java_dirs=(`ls -1 "$JAVADIR" | sort | tac`)
  IFS=
  for D in "${potential_java_dirs[@]}"; do
    if [[ -d "$JAVADIR/$D" && -x "$JAVADIR/$D/bin/java" ]]; then
      JAVA_PROGRAM_DIR="$JAVADIR/$D/bin/"
      echo $MSG2 $JAVA_PROGRAM_DIR
      if check_version ; then
        return 0
      else
        return 1
      fi
    fi
  done
  echo $MSG8 "${JAVADIR}/" $MSG9 ; echo $MSG4
  return 1
}

check_version()
{
  JAVA_HEADER=`${JAVA_PROGRAM_DIR}java -version 2>&1 | head -n 1`
  JAVA_IMPL=`echo ${JAVA_HEADER} | cut -f1 -d' '`
  if [ "$JAVA_IMPL" = "java" ] ; then
    VERSION=`echo ${JAVA_HEADER} | sed "s/java version \"\(.*\)\"/\1/"`
    if echo $VERSION | grep "^1.[0-3]" ; then
      echo $MSG3 "[${JAVA_PROGRAM_DIR}java = ${VERSION}]" ; echo $MSG4
      return 1
    else
      echo $MSG5 "[${JAVA_PROGRAM_DIR}java = ${VERSION}]" ; echo $MSG6
      return 0	      
    fi
  else
    echo $MSG7 "[${JAVA_PROGRAM_DIR}java = ${JAVA_IMPL}]" ; echo $MSG4
    return 1
  fi
}

echo $MSG1

# locate and test the java executable
if [ "$JAVA_PROGRAM_DIR" == "" ]; then
  if ! command -v java &>/dev/null; then
    echo $MSG10
    if ! look_for_java ; then
      exit 1
    fi
  else
    echo $MSG11
    if ! check_version ; then
      if ! look_for_java ; then
        exit 1
      fi
    fi
  fi
fi

# get the app dir

##SCRIPT DIR
readlink(){
  local path=$1 ll

  if [ -L "$path" ]; then
    ll="$(LC_ALL=C ls -l "$path" 2> /dev/null)" &&
    echo "${ll/* -> }"
  else
    return 1
  fi
}

script=$0
count=0
while [ -L "$script" ]
do
  script=$(readlink "$script")
  count=`expr $count + 1`

  if [ $count -gt 100 ]
  then
    echo "Too many symbolic links"
    exit 1
  fi
done

PROGRAM_DIR=`dirname $script`
PROGRAM_DIR=`cd "$PROGRAM_DIR"; pwd`
LIBDIR=${PROGRAM_DIR}/lib

cd "${LIBDIR}"

# build the classpath
for FILE in *.jar; do CLASSPATH="${CLASSPATH}:${LIBDIR}/${FILE}"; done

cd "${PROGRAM_DIR}"

${JAVA_PROGRAM_DIR}java -Xmx512m -cp ${CLASSPATH} -Djava.library.path="${PROGRAM_DIR}/lib" -Djava.net.preferIPv4Stack=true org.scohen.juploadr.app.JUploadr "$@"

 	  	 
